<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <h1>{{msg}}</h1>
    </div>
    <a href=""></a>
<script src="node_modules/vue/dist/vue.js"></script>
<script>
    const vm = new Vue({
        el:"#app",
        data : {
            msg :"hello world"
        },
        beforeCreate(){
            console.warn("调用befoerCreate时候:",this.msg)
        },
        created(){
            console.warn("调用created时候:",this.msg)
        }
       
    })

</script>
</body>
</html>
